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Effect of crop type and processing on the in sacco dry matter degradability of alkali-preserved whole-crop cereals in dairy cows

Published online by Cambridge University Press:  05 November 2021

M.H. Roodsary  and
A. Younger
M.H. Roodsary
Affiliation:
Department of Agriculture, University of Newcastle upon Tyne, NE1 7RU
A. Younger
Affiliation:
Department of Agriculture, University of Newcastle upon Tyne, NE1 7RU
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Extract

Little information is available on the dry matter degradability of whole-crop cereals and their components (Hill and Leaver 1994). In this experiment, the in sacco degradability of the DM of four cereal crops was determined, and the effect of physical alteration of whole-crops and their component parts was investigated.

Winter sown crops of wheat (var.Riband) and barley (var.Marinka) and spring sown crops of wheat (var.Axona) and barley (var.Tyne) were cut at the “hard dough” stage of crop maturity and preserved with urea at 40 g kgDM-1 in plastic silos. The in sacco DM degradability of samples of these crops was determined in two fistulated dairy cows (Jerseys, mean liveweight 450 kg) using the method of Paine, Crawshaw and Barber (1982). The cows were fed alfalfa cubes (16% protein) and meadow grass hay, each at 3 kg d-1, and had continuous access to water.

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Information
Proceedings of the British Society of Animal Science , Volume 1996 , March 1996 , pp. 231
Copyright
Copyright © The British Society of Animal Science 1996

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References

Hill, J and Leaver, J.D 1994. The dry matter and nitrogen degradation of whole crop wheat cut at three stages of crop maturity BSAS winter meeting.No:99.10.1017/S0308229600026465CrossRefGoogle Scholar
Paine, C.A., Crawshaw, R. and Barber, W.P. 1982. A complete exchange method for the in sacco estimation of rumen degradability on a routine basis Occ.Public.British Society of Animal Production 6:177–178.Google Scholar
Orskov, F.R. and McDonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighed according to rate of passage. Journal of Agricultural Science, Cambridge 92:49–503.10.1017/S0021859600063048CrossRefGoogle Scholar